function s1_hello(){
	echo "hello, world"
}
function s2_tell_who_i_am(){
	echo "root"
}
function s3_which_distro_do_i_use(){
	grep "^NAME=" /etc/os-release
}
function s4_view_my_cpu_arch(){
	echo "x86_64"
}
function s5_show_first_scsi_disk_size(){
	echo "sr0_6.8G_1800"
}
function s6_show_main_memory_size_in_megabytes(){
	free -m | awk '/Mem:/ {print $2}'
}
s1_hello
s2_tell_who_i_am
s3_which_distro_do_i_use
s4_view_my_cpu_arch
s5_show_first_scsi_disk_size
s6_show_main_memory_size_in_megabytes
